// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
signed main()
{
	int t;
	cin>>t;
	while(t--)
	{
		int n;
		cin>>n;
		vector<int> v(n);
		for(int i=0;i<n;i++)cin>>v[i];
		sort(v.begin(),v.end());
		int l=0,r=l;
		int count=0;
		while(l<n)
		{
			while(r<n)
			{
				if((l-r)%2==0)count++;
				else if(v[(r-l)/2+l]==v[(r-l)/2+l+1])count++;
				r++;
			}
			l++;
			r=l;
		}
		cout<<count<<endl;
	}
	return 0;
}
